Drilling machine



W. J, BAYBER, DECD- n. u. BAYRER aims ADMlNlSIRAT-OR.

DRILLINGMACHINE. 4 APPLICATION man saw. 18. (91.9..

hall

W-41. BAYRER, DECD.

n. H. BAYREB BEING ADMINISTRATOR.

DRILLING MAGHINE. APPLICATION FILED SEPT- 18. 1919.

Patented May 23,1922

' .bavem tar:

F510 Jfiayrer Machines, of. which the WILLIAIK J. BAYREB, OF HARTFOBD,CONNECTICUT; HOMER H. BA'YRE ADMINISTRATOR OF ,SAID WILLIAIE BETNGASSIGNOR T0 a. BAYRER, DECEASED,

ROBERT G. HENRY, or wnsr rmn'rronn, CONNEGTECUT.

DRILLING MACHINE.

Specification of Letters Patent.

Patented May 23, 1922.

Application filed September 18, 1919. Serial Ito-324,630.

To all whom it may concern:

Be it known that I, WILLIAM J. BAYRER, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inDrilling following is a specification.

This invention relates to drilling ma chines and especially to auxiliarymechanism suitable for drilling machines. of the well known typewhereina .longitudinally movable tool carrying spindle is arranged to berotated at various speeds best adapted for drilling holes within therange of its capacity. 7

The object of the invention is the pro- Vision in a machine of the typementioned,

.of simple mechanism including a supplepacity of the machine byfurnishingavail able speeds suited to a drill sizes.

The various features of novelty which broadly characterize the inventionare embodied in either form of construction illus trated in theaccompanying drawings and fully described in the followingspecification, while the appended claims define the scope of theinvention, whicl1,it is to be understood, is not limited to theexactarrangement shown and described.

In the drawings,

Figure 1, is a side view of a drillingniachine provided with mechanismembodying the preferred form of my invention.

Figure 2, is a view partly in longitudinal section of elements which areshown in F 1 on a smaller scale and. in elevation.

Figure .3, is a view similar to Fig. 1. showing modified form of myinvention. and,-.-

Figure 4, is a view similar to Fig. 2, showing partly in longitudinalsection, elements which are shown in Fig. 3, on a smaller scale and inelevation.

Like characters of reference designate like greater number of partsthroughout the several views of the drawings.

Referring to the drawings of the preferred form of my invention, thenumeral l, designates the base. Qthe pillar or column. and 3 the worktable or support of drilling niachine. A bracket 4., secured to the column, supports a sleeve 5, the latter being longitudinally movabletogether with the spindle 6, which is rotatably extended through thesleeve. The spindle and sleeve may be counterbalanced iii-the usualmanner by a weight 7, to which the sleeve is suitably connected as bythe cable or chain 7. This arrangement permits movement of the sleeve tobe effected with ease as through rack and pinion mechanism includingrack S, pinion 9, and the manually operable lever 10, which provides ina familiar and obvious manner for control of the feed of a toolassociated with the spindle.

' Means for rotating the spindle at several different speeds may includea stepped or cone pulley as 11. These speeds are suit- .iblefor suchsizes of drills as are intended to be carried directly by the mainspindle. which .as shown, is provided with the taper socket 12. Asalready intimated the present invention consists of mechanism associatedwith a drilling machine like or similar to that above described wherebythe several speeds of the main spindle may be converted into a similarnumber of higher speeds suitable for drills of series of smaller thanthe sizes of drills of a series for which the speeds of the mainspiudleare adapted.

he additionalmechanism includes driving elements as the flangedpulleysi. and 15, and the driven elements, as the flanged pulley 16, and pulley17. the latter comprising an enlarged portion of the supplemental toolchuck carrier or spindle it. The pulley it, is secured to, and rotateswith an arbor 19. having a taper shank to fit the socket 152. beforereferred to. and with which drill spindles are commonly provided. Thepulley 17, is also supported by arbor 19. but is rotatable thereon.-Annular ball bearings are fitted within the pulley 17, and upon itsarbor. They are held in position by a head on the arbor, the spacingcollar 20, and a cap 21, the latter being threaded into one end of thepulley. A thrust bearing, comprising ball 22, engaging hardened washersheld in sockets respectively in the arbor and the tool carrier, isprovided to resist thrust developed when a tool in the carrier engagesits work. It will be noted that the bearings just described are soenclosed as to be well adapted for the lubrication desirable forextremely high speeds. Pulleys 15, and 16, are integrally connected byahub 23, and mounted in axial parallelism with spindle 6, on a shaft 24.Said shaft at one end is provided with a head 25, to engage the innerring of an annular ball bearing 26, mounted thereon. The inner ring ofanother ball bearing of the annular type 27, is also mounted on theshaft and spaced from the other hearing by an elongated collar 28,beyond which another collar 29, and a nut 30, are respectively sleevedand threaded upon the shaft.

By means of the nut the bearing elements on the shaft may be drawn intosecure and rigid relation. The outer rings of bearings 26, and 27, arerespectively held in the pulley hub near the lower and upper endsthereof. In order to retain lubricant for the bearings the pulley hub isfitted at its ends with suitable caps as 35, and 36.

Means are provided to support shaft 24, in a manner to permit of itsadjustment to tension belts 38 and 39, and also to align pulleys 15 and16, respectively with pulleys 14 and 17. Such means may include thesplit collar 40, and a holder 41, the latter being held by a set screw42, in a depending arm 43, of said split collar, which collar is clampedto the spindle feeding sleeve by a screw 44. The head 45, of holder 41,is bored to receive the slightly reduced end 46, of shaft 24, which maybe held as desired by the set screw 47. In order to entirely remove thispreferred form of high speed attachment from the drilling machine it isnecessary to simply loosen the screw 44, and to disengage the tapershank of arbor 19. from its socket 12.

Referring to Figs. 3 and 4, which illustrate a modified form of myinvention, the parts comprising the auxiliary mechanism will now bedescribed. The driving elements thereof are the flanged pulleys 50 and51, and the driven elements are the pulleys F52 and The pulley 50, issecured to and rotates with the main spindle 6, while pulley 53, issupported on an arbor 54, in a manner identical to that alreadydescribed in setting forth the arrangement of pulley 17, in thepreferred form of the invention. Pulleys 51 and 52, are integrallyconnected. by an elongated hub 51, and mounted in axial parallelism withspindle 6, on a shaft Said shaft-at one end is provided with a head 56,to engage the inner rin of an annular ball bearing 57, mounted t ereon.The inner ring of another ball bearing of the annular type 58, is alsomountedon the shaft and spaced from the other bearing by an elongatedcollar 59, beyond which another collar 60, is sleevedupon the shaft toproperly space bearing 58, from the shaft support 61, through whichlatter the shaft extends to receive on its threaded end, a nut 62,-bymeans of which the shaft and the parts thereon may be drawn into secureand rigid relation. The outer rings of bearings 57 and 58, arerespectively held in the pulley hub near the lower and upper endsthereof. In order to retain lubricant for the bearings, the pulley hubis fitted at its ends with suitable caps as 63 and 64. Shaft support 61,is adjustably secured to a shank 66, of the split collar 67, which maybe clamped to the spindle feeding sleeve by a screw 68. By adjustment ofthe shaft support 61, along the collar shank, a suitable tension may beeffected for the belts 71 and 72. said belts being provided to transmitmotion from the driving to thedriven elements described. When thesupport is adjusted to a suitable position it may be secured againstdisplacement by set screw 73.

In as much as the speed converting mechanism set forth in either form ofthe invention is entirely supported by sleeve 5, it follows that feedingof the tool driven thereby may be accomplished in the same manner and bythe same mechanism as that of a tool carried by the spindle proper.Furthermore this method of attaching the speed converting mechanismrequires nothing in the nature of bosses, brackets or the like, inpermanent association with the rest of the machine.

Having thus described my invention, what I claim is,

1. In a drilling machine, in combination, a support, a non-rotativelongitudinally movable sleeve carried by the support, a rotary spindleextending through and movable with the sleeve, a tool carrier rotatablymounted on the spindle, and spindle driven means supported by the sleeveand adapted to drive the tool carrier.

2. In a drilling machine, in combination, a support, a longitudinallymovable sleeve carried by the support, a rotary spindle extendingthrougl'i and movable with the sleeve, a driving element on the spindle,a tool carrier including a driven element rotatably mounted upon and inaxial coincidence with the spindle, a radially extended arm secured tothe sleeve, a shaft supported in the arm, and means associated with theshaft adapted to be driven by the driving element on the spindle andadapted to drive the driven element associated with the tool carrier. r

In a drilling machine, in combination, a support, a longitudinallymovable sleeve carried by the support, a rotary spindle extendingthrough and movable with the sleeve, a pulley secured to the rotaryspindle, a rotary tool carrier mounted on the spindle and adapted toreceive and be driven by a belt, an arm secured to the sleeve, a pulleysupported by the arm, a belt engaging the spindle pulley and the armsupported pulley a second belt engaging the tool carrier and the armsupported pulley, and means for permitting adjustment of the arm totension the belts.

In testimony whereof I have afiixed my signature.

WILLIAM J. BAYRER.

